For Windows Users:
1. Click on the link above for the image size that you prefer and wait for the image to load.
2. Now you can right-click on the full-size image and choose "Set as Background" from the menu to make the image directly into wallpaper on your desktop.

For MAC Users:
1. Click on the link above for the image size that you prefer and wait for the image to load.
2. Click and hold on the image and save it to your hard drive.
3. Go to your Desktop Pictures control panel, click "Select Picture". You may already have a picture there. If so, click "Remove Picture". Once the image is removed choose "Select Picture" and choose the newly saved image.
4. Click "Set Desktop".